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These Speedmaster main bearings are just what you need to freshen up your engine
4340 chromoly H-beam connecting rods
stable air flow at any rpm
this turnkey engine delivers modern usability with vintage legend
6 pinion gear
Chevy LS1 LS6 1.600" STD 8mm Stainless Steel Exhaust Valves These Speedmaster main bearings areWhen it's time for valves, don't cut corners. Get genuine Speedmaster stainless steel valves. They're made from a tough, stainless steel alloy and are carefully designed to increase gas flow for more power. What's more, they have hardened stem tips for durability and are swirl polished. 0
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